Improvement in loom-shedding mechanisms



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G. GROMPTON. Loom-Shedding Mechanisms. 476.

Patented July 1, 1873 AM more umasmmw ca ux(ossomvs.'e Fmzcasa)ZSBeets-'Sheet2 G. GROHPTDN. Loom-Shedding Mechanisms. No. 140,476. PPatentedJulyLISYS.

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UNITED STATES PATENT QFFICEO GEORGE OROMPTON, OF VVOROESTER,MASSACHUSETTS.

IMPROVEMENT IN LbOM-SHEDDING MECHANISMS.

Specification forming part of Letters Patent No. 140,476, dated July 1,1873; application filed November 2, 1872.

To all whom it may concern:

Be it known that I, GEORGE CRoMP'roN, of Worcester, in the county of\Vorcester and State of Massachusetts, have invented an Improvement inLooms; and I do hereby declare that the following, taken in connectionwith the drawings which accompany and form part of this specification,is a description of my invention sufficient to enable those skilled inthe art to practice it.

' My invention relates particularly to details of construction ororganization of the barness mechanism of that class of fancy loomsemploying, in connection with. a pattern chain or cylinder, horizontalhooked jacks for effecting the distribution of the harnesses to form thesuccessive sheds, the invention being, however, applicable to other jackmovements.

In the arrangement of the harness mechanism shown in the drawing, Iarrange the jack-bars below the harness-levers, and jointed to verticalarms extending from said levers, the levers normally resting upon thepattern-cylinder by gravity, or being drawn toward the cylinder by thestress of the cording, and the cylinder being arranged between thejointed ends of the jack-bars and the hooked ends thereof, and theeveners operating upon the vertical arms of the harness-levers, whilethe cording for each harness-frame is from the opposite horizontal armsof the harness-levers, or from one of said arms and the vertical arm ofthe lever, the cording running over suitable sheaves, and the lever-armsbeing provided with notches to adjust the strain of the cording.

The invention consists, primarily, in com bining a vertical arm of ananglelever (jointed to or directly actuated by the jack-bars) with ahorizontal arm, to which one end of the harness-cording is fastened, theother end of the cording being fastened to an oppositelyextendinghorizontal arm of the lever, or to the vertical arm directly actuated bythe jack, the extremities of either or both arms being notched, for thepurpose of grading the shed from back to front when the shed is formed.

The drawing represents, in end view and in front elevation, a loom-frameand harness mechanism embodying my invention.

a denotes the loom-frame; b, the shaft that operates the chain-cylinderand harness mechanism; c d, two of the harness-leaves; e, the frame inwhich is mounted the harness-operatin g mechanism. f is the chain orpattern cylinder, which cylinder is intermittently turned by adrag-pawl, g, connected by a link, It, lever 1', and link k, with anarm, I, jointed to a crank-pin, m, extending from the crank-wheel a, atthe end of the shaft 1). 0 0 denote two of the jacks or jack-bars, saidbars being horizontal, with their'outerends passingthrough guideslots19, and their inner ends jointed to vertical arms q of horizontalharness levers r, fulcrumed on a shaft, 8, each jack having an upperhook, I, and a lower hook, at, and each lower hook standing normally (orwhen rosting against the periphery of the pattern-cylinder) in positionto be operated by a lifter or de'presser bar, 1:, while, when raised bythe pattern chain or cylinder, the upper hook is carried into positionto be operated by a lifter or depresser bar, to, the bar 0; beingattached. to and actuated by a slide-rod, ac, and the bar to attached toand operated by a slide-rod, y, arms projecting from said slides beingconnected to two arms, 2, of a rocker shaft, M, an arm, b of which shaftis connected by a link, 0 with the crank-pin m. -A horizontalevener-bar, d is also attached to each slide-rod as 3 said barsextending over the jack-bars and the vertical arms q of theharness-levers passin g between them, so that the lever-arms are broughtinto the same vertical plane by the action of the evener and depressorbars, for redistribution after each shed has been formed and the shuttlethrown. Each harness-lever is made with the vertical arm q, to which thejack is jointed, and against which the litter and depresser bars act,and also with a horizontal arm, or with two opposite horizontal arn'i's,e f the cording of the harness-frame being either from the vertical armto one of the horizontal arms of each lever, or to twooppositely-extending horizontal arms of each lever. One of theharness-levers I have shown as connected to the harness-frame by a cord,9 running from the horizontal outer arm of the lever over aguide-sheave, W, and another guide-sheave, i down to the top of theharness-frame, and another cord, j running over a guide-sheave, l andthen vertically downward to a guide-sheave, m at the bottom of theframe, from which sheave the cord passes horizontally to another sheave,M, and thence upward to the bottom of the harness-frame. With the otherharness-lever, the cord 0 passes from the vertical arm q of the leverdiagonally, or in an inclined upward direction, to a sheave, 29 (side ofthe sheave 5 and then down to the top of the harness-frame, while theother cord, (1 passes from the inner horizontal arm of the lever downvertically to a sheave at the bottom of the frame (1/, thencehorizontally to a sheave, a and thence npward to the bottom of theharness-frame. Each lever-arm to which the cording is attached is madewith a series of notches, 1' by means of which the inclination of theshed is effected, as may be necessary or desirable.

I claim 1. The three armed harness-levers having their ertical armsconnected with hooked jacks moved by the lifting and depressing andpattern mechanism, and notched, as shown and described, so that theharness-cording may be extended at option, either from two oppositehorizontal arms of the same lever, or from one of said arms and thevertical arm of the same lever, as and for the purpose described.

2. The combination of the harness-levers provided with a vertical andhorizontal arm, the harness-cording, horizontal jacks, lifter,depresser, and evener bars, and pattern chain or cylinder, whenconstructed and arranged to operate as shown and described.

GEO. OROMPTON.

Witnesses:

J. A. WARE, J. B. SYME.

